1 Answer
Watch video here>>https://www.youtube.com/watch?v=C7PmbEFw8fk
Read here>>http://www.abacuslessons.com/advanced-abacus-techniques/page1.html
http://scienceblogs.com/goodmath/2006/09/25/division-on-the-abacus/
7 years ago. Rating: 3 | |
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